1 Risø National Laboratory for Sustainable Energy, Technical University of Denmark2 unknown3 Department of Physics, Technical University of Denmark
A generalization of the Blume-Emery-Griffiths model is introduced in which an entropy stabilization of the high-temperature phase is controlled by a degeneracy parameter p greater than or equal to 1. The model describes a first- and a second-order phase transition as a function of temperature between two ordered phases. This is relevant for the martensitic transition problem. Mean-field calculations and Monte Carlo simulations are presented. The model predicts a constant entropy change at the transition for various transition temperatures in agreement with the behavior found experimentally.
Physical Review B Condensed Matter, 1996, Vol 53, Issue 14, p. 8915-8921
Materialer med særlige fysiske og kemiske egenskaber; Nye funktionelle materialer